Publ. no. 254, (1999) ISBN 1-901502-80-5, 260 + xii pages, price £41.50
The publication was sponsored by the German National Committee of the International Hydrological Programme of UNESCO and of the Operational Hydrology Programme of the World Meteorological Organization
There is an increasing demand for the forecasting of water quantity and quality at all scales from the local (point) to the regional (meso and macro) scale, and so regionalization has become one of the major issues in hydrology.
The basic principles of many hydrological processes are well understood and numerous models, applicable at different scales, have been developed. However, it is not usually possible to apply such models across scales because the model structure, and/or the model parameters, are scale variant. Therefore in addition to the classical definition of regionalization (determination of hydrologically similar units), it is necessary to analyse problems concerned with interpolation, and up- and downscaling. While interpolation takes place at a certain scale, up- and downscaling are concerned with a change of scale from the local up to the regional scale, or vice versa.
This volume comprises a selection of 28 papers from an international conference held in 1997 at Braunschweig, Germany, which explored new mathematical and computational tools to describe and analyse the behaviour of hydrological systems at all relevant scales from the point to the global, for whole systems and for subsystems. The papers provide an overview of actual model and regionalization concepts, scaling of properties and processes, and of modern software tools.